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<div class="header">
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<div class="title">IndexIVF.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * This source code is licensed under the CC-by-NC license found in the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">/* Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">   Inverted list structure.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &quot;IndexIVF.h&quot;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;cstdio&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#include &quot;utils.h&quot;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &quot;hamming.h&quot;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;FaissAssert.h&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;IndexFlat.h&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &quot;AuxIndexStructures.h&quot;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> * IndexIVF implementation</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a617f8c4ff40619d141c5c21dbf758ddf">   32</a></span>&#160;IndexIVF::IndexIVF (<a class="code" href="structfaiss_1_1Index.html">Index</a> * quantizer, <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nlist,</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;                    <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric):</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    <a class="code" href="structfaiss_1_1Index.html">Index</a> (d, metric),</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    nlist (nlist),</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    nprobe (1),</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    quantizer (quantizer),</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    quantizer_trains_alone (false),</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    own_fields (false),</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    ids (nlist),</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    maintain_direct_map (false)</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;{</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    FAISS_ASSERT (d == quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> &amp;&amp; (quantizer-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>);</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <span class="comment">// Spherical by default if the metric is inner_product</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#a9746bcd42ecec1501f221e918b25e8e7">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d">spherical</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    }</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    <span class="comment">// here we set a low # iterations because this is typically used</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="comment">// for large clusterings (nb this is not used for the MultiIndex,</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="comment">// for which quantizer_trains_alone = true)</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a9746bcd42ecec1501f221e918b25e8e7">cp</a>.<a class="code" href="structfaiss_1_1ClusteringParameters.html#a5c7c6f05c75e1668befdb3be148fd5f9">niter</a> = 10;</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a9746bcd42ecec1501f221e918b25e8e7">cp</a>.verbose = <a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;}</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;IndexIVF::IndexIVF ():</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    nlist (0), nprobe (1), quantizer (nullptr),</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    quantizer_trains_alone (false), own_fields (false),</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    maintain_direct_map (false)</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;{}</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div>
<div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">   64</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">IndexIVF::add</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x)</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;{</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#aa6931dfe054b33b02c842ff75f7a0c7f">add_with_ids</a> (n, x, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;}</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;</div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#aae6f0fae1f0721af3aa0b5ea1bd9980d">   69</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#aae6f0fae1f0721af3aa0b5ea1bd9980d">IndexIVF::make_direct_map</a> ()</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;{</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    direct_map.resize (<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>, -1);</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> key = 0; key &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; key++) {</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        <span class="keyword">const</span> std::vector&lt;long&gt; &amp; idlist = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key];</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">long</span> ofs = 0; ofs &lt; idlist.size(); ofs++) {</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            direct_map [idlist [ofs]] =</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;                key &lt;&lt; 32 | ofs;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        }</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    }</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;}</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">   87</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">IndexIVF::reset</a> ()</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;{</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    direct_map.clear();</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>.size(); i++)</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[i].clear();</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;}</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;</div>
<div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">   96</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">IndexIVF::train</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;{</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> &amp;&amp; (<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>)) {</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;            printf (<span class="stringliteral">&quot;IVF quantizer does not need training.\n&quot;</span>);</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#a23ee7f75f8be4472a17778f2b33875de">quantizer_trains_alone</a>) {</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;            printf (<span class="stringliteral">&quot;IVF quantizer trains alone...\n&quot;</span>);</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a8f67dfd73993e192dc78f2c93d9d9532">train</a> (n, x);</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        FAISS_ASSERT (<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> == <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a> ||</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;                      !<span class="stringliteral">&quot;nlist not consistent with quantizer size&quot;</span>);</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;            printf (<span class="stringliteral">&quot;Training IVF quantizer on %ld vectors in %dD\n&quot;</span>,</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;                    n, <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;        <a class="code" href="structfaiss_1_1Clustering.html">Clustering</a> clus (<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>, <a class="code" href="structfaiss_1_1IndexIVF.html#a9746bcd42ecec1501f221e918b25e8e7">cp</a>);</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">reset</a>();</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        clus.<a class="code" href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">train</a> (n, x, *<a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>);</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>-&gt;<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    }</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        printf (<span class="stringliteral">&quot;Training IVF residual\n&quot;</span>);</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">train_residual</a> (n, x);</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;}</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;</div>
<div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">  125</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">IndexIVF::train_residual</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x)</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;{</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>)</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;        printf (<span class="stringliteral">&quot;IndexIVF: no residual training\n&quot;</span>);</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    <span class="comment">// does nothing by default</span></div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;}</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div>
<div class="line"><a name="l00134"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#aeab84d4edf2cf9747c923e1a8395d9f3">  134</a></span>&#160;<span class="keywordtype">double</span> <a class="code" href="structfaiss_1_1IndexIVF.html#aeab84d4edf2cf9747c923e1a8395d9f3">IndexIVF::imbalance_factor</a> ()<span class="keyword"> const</span></div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    std::vector&lt;int&gt; hist (<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>);</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        hist[i] = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[i].size();</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    }</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    <span class="keywordflow">return</span> <a class="code" href="namespacefaiss.html#af762526714e6138009c72aee98657538">faiss::imbalance_factor</a> (nlist, hist.data());</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;}</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;</div>
<div class="line"><a name="l00143"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a513dfec3a250f08a9fdd18a24178e6bb">  143</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a513dfec3a250f08a9fdd18a24178e6bb">IndexIVF::print_stats</a> ()<span class="keyword"> const</span></div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    std::vector&lt;int&gt; sizes(40);</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; sizes.size(); j++) {</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;            <span class="keywordflow">if</span> ((<a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[i].size() &gt;&gt; j) == 0) {</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;                sizes[j]++;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;                <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;            }</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;        }</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    }</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; sizes.size(); i++) {</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;        <span class="keywordflow">if</span> (sizes[i]) {</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;            printf (<span class="stringliteral">&quot;list size in &lt; %d: %d instances\n&quot;</span>,</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;                    1 &lt;&lt; i, sizes[i]);</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        }</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    }</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;}</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;</div>
<div class="line"><a name="l00163"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">  163</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">IndexIVF::merge_from</a> (<a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &amp;other, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> add_id)</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;{</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    <span class="comment">// minimal sanity checks</span></div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    FAISS_ASSERT (other.<a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> == <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>);</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    FAISS_ASSERT (other.<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a> == <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>);</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    FAISS_ASSERT ((!<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a> &amp;&amp; !other.<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>) ||</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;                  !<span class="stringliteral">&quot;direct map copy not implemented&quot;</span>);</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    FAISS_ASSERT (<span class="keyword">typeid</span> (*<span class="keyword">this</span>) == <span class="keyword">typeid</span> (other) ||</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;                  !<span class="stringliteral">&quot;can only merge indexes of the same type&quot;</span>);</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;        std::vector&lt;idx_t&gt; &amp; src = other.<a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[i];</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;        std::vector&lt;idx_t&gt; &amp; dest = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[i];</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">long</span> j = 0; j &lt; src.size(); j++)</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;            dest.push_back (src[j] + add_id);</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;        src.clear();</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    }</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#aacaf0b2529a9d9def094ea3728a12824">merge_from_residuals</a> (other);</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> = 0;</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;}</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;IndexIVF::~IndexIVF()</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;{</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#aed2e9757ad5f3c234fd8ad60175a2a73">own_fields</a>) <span class="keyword">delete</span> <a class="code" href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">quantizer</a>;</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;}</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;</div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="comment">/*****************************************</span></div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="comment"> * IndexIVFFlat implementation</span></div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="comment"> ******************************************/</span></div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;IndexIVFFlat::IndexIVFFlat (Index * quantizer,</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;                            <span class="keywordtype">size_t</span> d, <span class="keywordtype">size_t</span> nlist, <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> metric):</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;    IndexIVF (quantizer, d, nlist, metric)</div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;{</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    vecs.resize (nlist);</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    set_typename();</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;}</div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;</div>
<div class="line"><a name="l00207"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a0117e9eac02ce8d106d8a288234f365c">  207</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a0117e9eac02ce8d106d8a288234f365c">IndexIVFFlat::set_typename</a> ()</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;{</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    std::stringstream s;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT)</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;        s &lt;&lt; <span class="stringliteral">&quot;IvfIP&quot;</span>;</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_L2)</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        s &lt;&lt; <span class="stringliteral">&quot;IvfL2&quot;</span>;</div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    <span class="keywordflow">else</span> s &lt;&lt; <span class="stringliteral">&quot;??&quot;</span>;</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;    s &lt;&lt; <span class="stringliteral">&quot;[&quot;</span> &lt;&lt; nlist &lt;&lt; <span class="stringliteral">&quot;:&quot;</span> &lt;&lt; quantizer-&gt;index_typename &lt;&lt; <span class="stringliteral">&quot;]&quot;</span>;</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;    index_typename = s.str();</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;}</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;</div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;</div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;</div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;</div>
<div class="line"><a name="l00224"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a5f7356766632d3ce2838f285aa6b8e76">  224</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a5f7356766632d3ce2838f285aa6b8e76">IndexIVFFlat::add_with_ids</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids)</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;{</div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFFlat.html#aea729c3d8c70bdd93f8e413e834851a4">add_core</a> (n, x, xids, <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;}</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;</div>
<div class="line"><a name="l00229"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#aea729c3d8c70bdd93f8e413e834851a4">  229</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#aea729c3d8c70bdd93f8e413e834851a4">IndexIVFFlat::add_core</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids,</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;                             <span class="keyword">const</span> <span class="keywordtype">long</span> *precomputed_idx)</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;{</div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;    FAISS_ASSERT (<a class="code" href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">is_trained</a>);</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">long</span> * idx;</div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    <span class="keywordflow">if</span> (precomputed_idx) {</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;        idx = precomputed_idx;</div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;    } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;        <span class="keywordtype">long</span> * idx0 = <span class="keyword">new</span> <span class="keywordtype">long</span> [n];</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;        quantizer-&gt;assign (n, x, idx0);</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        idx = idx0;</div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    }</div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;    <span class="keywordtype">long</span> n_add = 0;</div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; n; i++) {</div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;        <span class="keywordtype">long</span> <span class="keywordtype">id</span> = xids ? xids[i] : <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> + i;</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;        <span class="keywordtype">long</span> list_no = idx [i];</div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;        <span class="keywordflow">if</span> (list_no &lt; 0)</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;            <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;        FAISS_ASSERT (list_no &lt; nlist);</div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no].push_back (<span class="keywordtype">id</span>);</div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">float</span> *xi = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;        <span class="comment">/* store the vectors */</span></div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0 ; j &lt; <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a> ; j++)</div>
<div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[list_no].push_back (xi [j]);</div>
<div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;</div>
<div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;        <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>)</div>
<div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;            direct_map.push_back (list_no &lt;&lt; 32 | (<a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no].size() - 1));</div>
<div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;        n_add++;</div>
<div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;    }</div>
<div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">verbose</a>) {</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        printf(<span class="stringliteral">&quot;IndexIVFFlat::add_core: added %ld / %ld vectors\n&quot;</span>,</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;               n_add, n);</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;    }</div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;    <span class="keywordflow">if</span> (!precomputed_idx)</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;        <span class="keyword">delete</span> [] idx;</div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> += n_add;</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;}</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;</div>
<div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a5ac4f051396a1535426baec8f401aa93">  273</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a5ac4f051396a1535426baec8f401aa93">IndexIVFFlat::search_knn_inner_product</a> (</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;    <span class="keywordtype">size_t</span> nx,</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> * x,</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">long</span> * __restrict keys,</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;    <a class="code" href="structfaiss_1_1HeapArray.html">float_minheap_array_t</a> * res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">size_t</span> k = res-&gt;<a class="code" href="structfaiss_1_1HeapArray.html#a1ee98429c766c77235f78c6d9aa32bb4">k</a>;</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; nx; i++) {</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">float</span> * xi = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">long</span> * keysi = keys + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;        <span class="keywordtype">float</span> * __restrict simi = res-&gt;<a class="code" href="structfaiss_1_1HeapArray.html#ae97911f6f85d152a5b45e459063b6858">get_val</a> (i);</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;        <span class="keywordtype">long</span> * __restrict idxi = res-&gt;<a class="code" href="structfaiss_1_1HeapArray.html#af6aa57addaa1bc754d09a2a08be4df49">get_ids</a> (i);</div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;        minheap_heapify (k, simi, idxi);</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;</div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> ik = 0; ik &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>; ik++) {</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;            <span class="keywordtype">long</span> key = keysi[ik];  <span class="comment">/* select the list  */</span></div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;            <span class="keywordflow">if</span> (key &lt; 0) {</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;                <span class="comment">// not enough centroids for multiprobe</span></div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;                <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;            }</div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;            <span class="keywordflow">if</span> (key &gt;= (<span class="keywordtype">long</span>) nlist) {</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;                fprintf (stderr, <span class="stringliteral">&quot;Invalid key=%ld  at ik=%ld nlist=%ld\n&quot;</span>,</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;                                  key, ik, nlist);</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;                <span class="keywordflow">throw</span>;</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;            }</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].size();</div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> * list_vecs = <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[key].data();</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; list_size; j++) {</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">float</span> * yj = list_vecs + d * j;</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;                <span class="keywordtype">float</span> ip = fvec_inner_product (xi, yj, d);</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;                <span class="keywordflow">if</span> (ip &gt; simi[0]) {</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;                    minheap_pop (k, simi, idxi);</div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;                    minheap_push (k, simi, idxi, ip, <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key][j]);</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;                }</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;            }</div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;        }</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;        minheap_reorder (k, simi, idxi);</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;    }</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;}</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;</div>
<div class="line"><a name="l00319"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a9ca8cc3ca71ff91f1e5e2db3b8ead615">  319</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a9ca8cc3ca71ff91f1e5e2db3b8ead615">IndexIVFFlat::search_knn_L2sqr</a> (</div>
<div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;    <span class="keywordtype">size_t</span> nx,</div>
<div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> * x,</div>
<div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">long</span> * __restrict keys,</div>
<div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;    <a class="code" href="structfaiss_1_1HeapArray.html">float_maxheap_array_t</a> * res)<span class="keyword"> const</span></div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">size_t</span> k = res-&gt;<a class="code" href="structfaiss_1_1HeapArray.html#a1ee98429c766c77235f78c6d9aa32bb4">k</a>;</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;</div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;<span class="preprocessor">#pragma omp parallel for</span></div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; nx; i++) {</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">float</span> * xi = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">long</span> * keysi = keys + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;        <span class="keywordtype">float</span> * __restrict disi = res-&gt;<a class="code" href="structfaiss_1_1HeapArray.html#ae97911f6f85d152a5b45e459063b6858">get_val</a> (i);</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;        <span class="keywordtype">long</span> * __restrict idxi = res-&gt;<a class="code" href="structfaiss_1_1HeapArray.html#af6aa57addaa1bc754d09a2a08be4df49">get_ids</a> (i);</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;        maxheap_heapify (k, disi, idxi);</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> ik = 0; ik &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>; ik++) {</div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;            <span class="keywordtype">long</span> key = keysi[ik];  <span class="comment">/* select the list  */</span></div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;            <span class="keywordflow">if</span> (key &lt; 0) {</div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;                <span class="comment">// not enough centroids for multiprobe</span></div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;                <span class="keywordflow">continue</span>;</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;            }</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;            <span class="keywordflow">if</span> (key &gt;= (<span class="keywordtype">long</span>) nlist) {</div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;                fprintf (stderr, <span class="stringliteral">&quot;Invalid key=%ld  at ik=%ld nlist=%ld\n&quot;</span>,</div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;                                  key, ik, nlist);</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;                <span class="keywordflow">throw</span>;</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;            }</div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;</div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].size();</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> * list_vecs = <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[key].data();</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; list_size; j++) {</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">float</span> * yj = list_vecs + d * j;</div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;                <span class="keywordtype">float</span> disij = <a class="code" href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">fvec_L2sqr</a> (xi, yj, d);</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;                <span class="keywordflow">if</span> (disij &lt; disi[0]) {</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;                    maxheap_pop (k, disi, idxi);</div>
<div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;                    maxheap_push (k, disi, idxi, disij, <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key][j]);</div>
<div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;                }</div>
<div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;            }</div>
<div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;        }</div>
<div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;        maxheap_reorder (k, disi, idxi);</div>
<div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;    }</div>
<div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;}</div>
<div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;</div>
<div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;</div>
<div class="line"><a name="l00364"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#acd2bdb06fcbe9d1f5799cf78aa6cdf0d">  364</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#acd2bdb06fcbe9d1f5799cf78aa6cdf0d">IndexIVFFlat::search</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;                                <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels)<span class="keyword"> const</span></div>
<div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> * idx = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> [n * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
<div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;    quantizer-&gt;assign (n, x, idx, <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>);</div>
<div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;</div>
<div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;   <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_INNER_PRODUCT) {</div>
<div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;        <a class="code" href="structfaiss_1_1HeapArray.html">float_minheap_array_t</a> res = {</div>
<div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;            size_t(n), size_t(k), labels, distances};</div>
<div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a5ac4f051396a1535426baec8f401aa93">search_knn_inner_product</a> (n, x, idx, &amp;res);</div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;    } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_L2) {</div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;        <a class="code" href="structfaiss_1_1HeapArray.html">float_maxheap_array_t</a> res = {</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;            size_t(n), size_t(k), labels, distances};</div>
<div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a9ca8cc3ca71ff91f1e5e2db3b8ead615">search_knn_L2sqr</a> (n, x, idx, &amp;res);</div>
<div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;    }</div>
<div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;</div>
<div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;    <span class="keyword">delete</span> [] idx;</div>
<div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;}</div>
<div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;</div>
<div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;</div>
<div class="line"><a name="l00385"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#ad2b306f160e153b5cfb572cf1d8ece24">  385</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#ad2b306f160e153b5cfb572cf1d8ece24">IndexIVFFlat::range_search</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> nx, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> radius,</div>
<div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;                                 <a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a> *result)<span class="keyword"> const</span></div>
<div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> * keys = <span class="keyword">new</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> [nx * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>];</div>
<div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;    quantizer-&gt;assign (nx, x, keys, <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>);</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;    assert (<a class="code" href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">metric_type</a> == METRIC_L2 || !<span class="stringliteral">&quot;Only L2 implemented&quot;</span>);</div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;<span class="preprocessor">#pragma omp parallel</span></div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;<span class="preprocessor"></span>    {</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;        <a class="code" href="structfaiss_1_1RangeSearchPartialResult.html">RangeSearchPartialResult</a> pres(result);</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i &lt; nx; i++) {</div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">float</span> * xi = x + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>;</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;            <span class="keyword">const</span> <span class="keywordtype">long</span> * keysi = keys + i * <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>;</div>
<div class="line"><a name="l00399"></a><span class="lineno">  399</span>&#160;</div>
<div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;            <a class="code" href="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult.html">RangeSearchPartialResult::QueryResult</a> &amp; qres =</div>
<div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;                pres.<a class="code" href="structfaiss_1_1RangeSearchPartialResult.html#a954c26beebb561a6c2b0f399c48a9db3">new_result</a> (i);</div>
<div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;</div>
<div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;            <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> ik = 0; ik &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">nprobe</a>; ik++) {</div>
<div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;                <span class="keywordtype">long</span> key = keysi[ik];  <span class="comment">/* select the list  */</span></div>
<div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;                <span class="keywordflow">if</span> (key &lt; 0 || key &gt;= (<span class="keywordtype">long</span>) nlist) {</div>
<div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;                    fprintf (stderr, <span class="stringliteral">&quot;Invalid key=%ld  at ik=%ld nlist=%ld\n&quot;</span>,</div>
<div class="line"><a name="l00407"></a><span class="lineno">  407</span>&#160;                             key, ik, nlist);</div>
<div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;                    <span class="keywordflow">throw</span>;</div>
<div class="line"><a name="l00409"></a><span class="lineno">  409</span>&#160;                }</div>
<div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;</div>
<div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">size_t</span> list_size = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key].size();</div>
<div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">float</span> * list_vecs = <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[key].data();</div>
<div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;</div>
<div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;                <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = 0; j &lt; list_size; j++) {</div>
<div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;                    <span class="keyword">const</span> <span class="keywordtype">float</span> * yj = list_vecs + d * j;</div>
<div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;                    <span class="keywordtype">float</span> disij = <a class="code" href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">fvec_L2sqr</a> (xi, yj, d);</div>
<div class="line"><a name="l00417"></a><span class="lineno">  417</span>&#160;                    <span class="keywordflow">if</span> (disij &lt; radius) {</div>
<div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;                        qres.add (disij, <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[key][j]);</div>
<div class="line"><a name="l00419"></a><span class="lineno">  419</span>&#160;                    }</div>
<div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;                }</div>
<div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;            }</div>
<div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;        }</div>
<div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;</div>
<div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;        pres.finalize ();</div>
<div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;    }</div>
<div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;    <span class="keyword">delete</span>[] keys;</div>
<div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;}</div>
<div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;</div>
<div class="line"><a name="l00429"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a8fc1695a87f33db1a16f8c50c3344cd3">  429</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a8fc1695a87f33db1a16f8c50c3344cd3">IndexIVFFlat::merge_from_residuals</a> (<a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> &amp;other_in)</div>
<div class="line"><a name="l00430"></a><span class="lineno">  430</span>&#160;{</div>
<div class="line"><a name="l00431"></a><span class="lineno">  431</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> &amp;other = <span class="keyword">dynamic_cast&lt;</span><a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> &amp;<span class="keyword">&gt;</span> (other_in);</div>
<div class="line"><a name="l00432"></a><span class="lineno">  432</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
<div class="line"><a name="l00433"></a><span class="lineno">  433</span>&#160;        std::vector&lt;float&gt; &amp; src = other.<a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[i];</div>
<div class="line"><a name="l00434"></a><span class="lineno">  434</span>&#160;        std::vector&lt;float&gt; &amp; dest = <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[i];</div>
<div class="line"><a name="l00435"></a><span class="lineno">  435</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; src.size(); j++)</div>
<div class="line"><a name="l00436"></a><span class="lineno">  436</span>&#160;            dest.push_back (src[j]);</div>
<div class="line"><a name="l00437"></a><span class="lineno">  437</span>&#160;        src.clear();</div>
<div class="line"><a name="l00438"></a><span class="lineno">  438</span>&#160;    }</div>
<div class="line"><a name="l00439"></a><span class="lineno">  439</span>&#160;}</div>
<div class="line"><a name="l00440"></a><span class="lineno">  440</span>&#160;</div>
<div class="line"><a name="l00441"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a1d0a5285344c3302ba10bb79f4578a82">  441</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a1d0a5285344c3302ba10bb79f4578a82">IndexIVFFlat::copy_subset_to</a> (<a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> &amp; other, <span class="keywordtype">int</span> subset_type,</div>
<div class="line"><a name="l00442"></a><span class="lineno">  442</span>&#160;                     <span class="keywordtype">long</span> a1, <span class="keywordtype">long</span> a2)<span class="keyword"> const</span></div>
<div class="line"><a name="l00443"></a><span class="lineno">  443</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00444"></a><span class="lineno">  444</span>&#160;    FAISS_ASSERT (nlist == other.<a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>);</div>
<div class="line"><a name="l00445"></a><span class="lineno">  445</span>&#160;    FAISS_ASSERT (!other.<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a>);</div>
<div class="line"><a name="l00446"></a><span class="lineno">  446</span>&#160;</div>
<div class="line"><a name="l00447"></a><span class="lineno">  447</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> list_no = 0; list_no &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; list_no++) {</div>
<div class="line"><a name="l00448"></a><span class="lineno">  448</span>&#160;        <span class="keyword">const</span> std::vector&lt;idx_t&gt; &amp; ids_in = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no];</div>
<div class="line"><a name="l00449"></a><span class="lineno">  449</span>&#160;        std::vector&lt;idx_t&gt; &amp; ids_out = other.<a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[list_no];</div>
<div class="line"><a name="l00450"></a><span class="lineno">  450</span>&#160;        <span class="keyword">const</span> std::vector&lt;float&gt; &amp; vecs_in = <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[list_no];</div>
<div class="line"><a name="l00451"></a><span class="lineno">  451</span>&#160;        std::vector&lt;float&gt; &amp; vecs_out = other.<a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[list_no];</div>
<div class="line"><a name="l00452"></a><span class="lineno">  452</span>&#160;</div>
<div class="line"><a name="l00453"></a><span class="lineno">  453</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; ids_in.size(); i++) {</div>
<div class="line"><a name="l00454"></a><span class="lineno">  454</span>&#160;            <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> <span class="keywordtype">id</span> = ids_in[i];</div>
<div class="line"><a name="l00455"></a><span class="lineno">  455</span>&#160;            <span class="keywordflow">if</span> (subset_type == 0 &amp;&amp; a1 &lt;= <span class="keywordtype">id</span> &amp;&amp; <span class="keywordtype">id</span> &lt; a2) {</div>
<div class="line"><a name="l00456"></a><span class="lineno">  456</span>&#160;                ids_out.push_back (<span class="keywordtype">id</span>);</div>
<div class="line"><a name="l00457"></a><span class="lineno">  457</span>&#160;                vecs_out.insert (vecs_out.end(),</div>
<div class="line"><a name="l00458"></a><span class="lineno">  458</span>&#160;                                  vecs_in.begin() + i * <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>,</div>
<div class="line"><a name="l00459"></a><span class="lineno">  459</span>&#160;                                  vecs_in.begin() + (i + 1) * d);</div>
<div class="line"><a name="l00460"></a><span class="lineno">  460</span>&#160;                other.<a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>++;</div>
<div class="line"><a name="l00461"></a><span class="lineno">  461</span>&#160;            }</div>
<div class="line"><a name="l00462"></a><span class="lineno">  462</span>&#160;        }</div>
<div class="line"><a name="l00463"></a><span class="lineno">  463</span>&#160;    }</div>
<div class="line"><a name="l00464"></a><span class="lineno">  464</span>&#160;}</div>
<div class="line"><a name="l00465"></a><span class="lineno">  465</span>&#160;</div>
<div class="line"><a name="l00466"></a><span class="lineno">  466</span>&#160;</div>
<div class="line"><a name="l00467"></a><span class="lineno">  467</span>&#160;</div>
<div class="line"><a name="l00468"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a9df8b023486f54c8f2c5452787807360">  468</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a9df8b023486f54c8f2c5452787807360">IndexIVFFlat::reset</a>()</div>
<div class="line"><a name="l00469"></a><span class="lineno">  469</span>&#160;{</div>
<div class="line"><a name="l00470"></a><span class="lineno">  470</span>&#160;    <a class="code" href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">IndexIVF::reset</a>();</div>
<div class="line"><a name="l00471"></a><span class="lineno">  471</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> key = 0; key &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; key++) {</div>
<div class="line"><a name="l00472"></a><span class="lineno">  472</span>&#160;        <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[key].clear();</div>
<div class="line"><a name="l00473"></a><span class="lineno">  473</span>&#160;    }</div>
<div class="line"><a name="l00474"></a><span class="lineno">  474</span>&#160;}</div>
<div class="line"><a name="l00475"></a><span class="lineno">  475</span>&#160;</div>
<div class="line"><a name="l00476"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#a46ee62aabc316ec38882a3f54e594559">  476</a></span>&#160;<span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a46ee62aabc316ec38882a3f54e594559">IndexIVFFlat::remove_ids</a> (<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a> &amp; sel)</div>
<div class="line"><a name="l00477"></a><span class="lineno">  477</span>&#160;{</div>
<div class="line"><a name="l00478"></a><span class="lineno">  478</span>&#160;    FAISS_ASSERT (!<a class="code" href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">maintain_direct_map</a> ||</div>
<div class="line"><a name="l00479"></a><span class="lineno">  479</span>&#160;                  !<span class="stringliteral">&quot;direct map remove not implemented&quot;</span>);</div>
<div class="line"><a name="l00480"></a><span class="lineno">  480</span>&#160;    <span class="keywordtype">long</span> nremove = 0;</div>
<div class="line"><a name="l00481"></a><span class="lineno">  481</span>&#160;<span class="preprocessor">#pragma omp parallel for reduction(+: nremove)</span></div>
<div class="line"><a name="l00482"></a><span class="lineno">  482</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 0; i &lt; <a class="code" href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">nlist</a>; i++) {</div>
<div class="line"><a name="l00483"></a><span class="lineno">  483</span>&#160;        std::vector&lt;idx_t&gt; &amp; idsi = <a class="code" href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">ids</a>[i];</div>
<div class="line"><a name="l00484"></a><span class="lineno">  484</span>&#160;        <span class="keywordtype">float</span> *vecsi = <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[i].data();</div>
<div class="line"><a name="l00485"></a><span class="lineno">  485</span>&#160;</div>
<div class="line"><a name="l00486"></a><span class="lineno">  486</span>&#160;        <span class="keywordtype">long</span> l = idsi.size(), j = 0;</div>
<div class="line"><a name="l00487"></a><span class="lineno">  487</span>&#160;        <span class="keywordflow">while</span> (j &lt; l) {</div>
<div class="line"><a name="l00488"></a><span class="lineno">  488</span>&#160;            <span class="keywordflow">if</span> (sel.is_member (idsi[j])) {</div>
<div class="line"><a name="l00489"></a><span class="lineno">  489</span>&#160;                l--;</div>
<div class="line"><a name="l00490"></a><span class="lineno">  490</span>&#160;                idsi [j] = idsi [l];</div>
<div class="line"><a name="l00491"></a><span class="lineno">  491</span>&#160;                memmove (vecsi + j * d,</div>
<div class="line"><a name="l00492"></a><span class="lineno">  492</span>&#160;                         vecsi + l * d, d * <span class="keyword">sizeof</span> (<span class="keywordtype">float</span>));</div>
<div class="line"><a name="l00493"></a><span class="lineno">  493</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00494"></a><span class="lineno">  494</span>&#160;                j++;</div>
<div class="line"><a name="l00495"></a><span class="lineno">  495</span>&#160;            }</div>
<div class="line"><a name="l00496"></a><span class="lineno">  496</span>&#160;        }</div>
<div class="line"><a name="l00497"></a><span class="lineno">  497</span>&#160;        <span class="keywordflow">if</span> (l &lt; idsi.size()) {</div>
<div class="line"><a name="l00498"></a><span class="lineno">  498</span>&#160;            nremove += idsi.size() - l;</div>
<div class="line"><a name="l00499"></a><span class="lineno">  499</span>&#160;            idsi.resize (l);</div>
<div class="line"><a name="l00500"></a><span class="lineno">  500</span>&#160;            <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[i].resize (l * d);</div>
<div class="line"><a name="l00501"></a><span class="lineno">  501</span>&#160;        }</div>
<div class="line"><a name="l00502"></a><span class="lineno">  502</span>&#160;    }</div>
<div class="line"><a name="l00503"></a><span class="lineno">  503</span>&#160;    <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a> -= nremove;</div>
<div class="line"><a name="l00504"></a><span class="lineno">  504</span>&#160;    <span class="keywordflow">return</span> nremove;</div>
<div class="line"><a name="l00505"></a><span class="lineno">  505</span>&#160;}</div>
<div class="line"><a name="l00506"></a><span class="lineno">  506</span>&#160;</div>
<div class="line"><a name="l00507"></a><span class="lineno">  507</span>&#160;</div>
<div class="line"><a name="l00508"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html#af7aa8b40cae6d50317049a252df8fb44">  508</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#af7aa8b40cae6d50317049a252df8fb44">IndexIVFFlat::reconstruct</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> key, <span class="keywordtype">float</span> * recons)<span class="keyword"> const</span></div>
<div class="line"><a name="l00509"></a><span class="lineno">  509</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00510"></a><span class="lineno">  510</span>&#160;    assert (direct_map.size() == <a class="code" href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">ntotal</a>);</div>
<div class="line"><a name="l00511"></a><span class="lineno">  511</span>&#160;    <span class="keywordtype">int</span> list_no = direct_map[key] &gt;&gt; 32;</div>
<div class="line"><a name="l00512"></a><span class="lineno">  512</span>&#160;    <span class="keywordtype">int</span> ofs = direct_map[key] &amp; 0xffffffff;</div>
<div class="line"><a name="l00513"></a><span class="lineno">  513</span>&#160;    memcpy (recons, &amp;<a class="code" href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">vecs</a>[list_no][ofs * d], d * <span class="keyword">sizeof</span>(recons[0]));</div>
<div class="line"><a name="l00514"></a><span class="lineno">  514</span>&#160;}</div>
<div class="line"><a name="l00515"></a><span class="lineno">  515</span>&#160;</div>
<div class="line"><a name="l00516"></a><span class="lineno">  516</span>&#160;</div>
<div class="line"><a name="l00517"></a><span class="lineno">  517</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00046">IndexIVF.h:46</a></div></div>
<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_a5c7c6f05c75e1668befdb3be148fd5f9"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#a5c7c6f05c75e1668befdb3be148fd5f9">faiss::ClusteringParameters::niter</a></div><div class="ttdeci">int niter</div><div class="ttdoc">clustering iterations </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00026">Clustering.h:26</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult_1_1QueryResult.html">faiss::RangeSearchPartialResult::QueryResult</a></div><div class="ttdoc">result structure for a single query </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00157">AuxIndexStructures.h:157</a></div></div>
<div class="ttc" id="namespacefaiss_html_a7466bd32de31640860393a701eaac5ad"><div class="ttname"><a href="namespacefaiss.html#a7466bd32de31640860393a701eaac5ad">faiss::fvec_L2sqr</a></div><div class="ttdeci">float fvec_L2sqr(const float *x, const float *y, size_t d)</div><div class="ttdoc">Squared L2 distance between two vectors. </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l00430">utils.cpp:430</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a9ca8cc3ca71ff91f1e5e2db3b8ead615"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a9ca8cc3ca71ff91f1e5e2db3b8ead615">faiss::IndexIVFFlat::search_knn_L2sqr</a></div><div class="ttdeci">void search_knn_L2sqr(size_t nx, const float *x, const long *keys, float_maxheap_array_t *res) const </div><div class="ttdoc">Implementation of the search for the L2 metric. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00319">IndexIVF.cpp:319</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_ae97911f6f85d152a5b45e459063b6858"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#ae97911f6f85d152a5b45e459063b6858">faiss::HeapArray::get_val</a></div><div class="ttdeci">T * get_val(size_t key)</div><div class="ttdoc">Return the list of values for a heap. </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00361">Heap.h:361</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aeab84d4edf2cf9747c923e1a8395d9f3"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aeab84d4edf2cf9747c923e1a8395d9f3">faiss::IndexIVF::imbalance_factor</a></div><div class="ttdeci">double imbalance_factor() const </div><div class="ttdoc">1= perfectly balanced, &amp;gt;1: imbalanced </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00134">IndexIVF.cpp:134</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a849361f5f0ab0aba8d419c86f2594191"><div class="ttname"><a href="structfaiss_1_1Index.html#a849361f5f0ab0aba8d419c86f2594191">faiss::Index::reset</a></div><div class="ttdeci">virtual void reset()=0</div><div class="ttdoc">removes all elements from the database. </div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_affed235eadf27a13d753ee4d33a1dc58"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#affed235eadf27a13d753ee4d33a1dc58">faiss::IndexIVF::nprobe</a></div><div class="ttdeci">size_t nprobe</div><div class="ttdoc">number of probes at query time </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00048">IndexIVF.h:48</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_af7aa8b40cae6d50317049a252df8fb44"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#af7aa8b40cae6d50317049a252df8fb44">faiss::IndexIVFFlat::reconstruct</a></div><div class="ttdeci">virtual void reconstruct(idx_t key, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00508">IndexIVF.cpp:508</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00058">AuxIndexStructures.h:58</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a23ee7f75f8be4472a17778f2b33875de"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a23ee7f75f8be4472a17778f2b33875de">faiss::IndexIVF::quantizer_trains_alone</a></div><div class="ttdeci">bool quantizer_trains_alone</div><div class="ttdoc">just pass over the trainset to quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00051">IndexIVF.h:51</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a0117e9eac02ce8d106d8a288234f365c"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a0117e9eac02ce8d106d8a288234f365c">faiss::IndexIVFFlat::set_typename</a></div><div class="ttdeci">virtual void set_typename() override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00207">IndexIVF.cpp:207</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_ad2b306f160e153b5cfb572cf1d8ece24"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#ad2b306f160e153b5cfb572cf1d8ece24">faiss::IndexIVFFlat::range_search</a></div><div class="ttdeci">virtual void range_search(idx_t n, const float *x, float radius, RangeSearchResult *result) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00385">IndexIVF.cpp:385</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a1d0a5285344c3302ba10bb79f4578a82"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a1d0a5285344c3302ba10bb79f4578a82">faiss::IndexIVFFlat::copy_subset_to</a></div><div class="ttdeci">void copy_subset_to(IndexIVFFlat &amp;other, int subset_type, long a1, long a2) const </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00441">IndexIVF.cpp:441</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a8fc1695a87f33db1a16f8c50c3344cd3"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a8fc1695a87f33db1a16f8c50c3344cd3">faiss::IndexIVFFlat::merge_from_residuals</a></div><div class="ttdeci">virtual void merge_from_residuals(IndexIVF &amp;other) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00429">IndexIVF.cpp:429</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_aa6931dfe054b33b02c842ff75f7a0c7f"><div class="ttname"><a href="structfaiss_1_1Index.html#aa6931dfe054b33b02c842ff75f7a0c7f">faiss::Index::add_with_ids</a></div><div class="ttdeci">virtual void add_with_ids(idx_t n, const float *x, const long *xids)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00032">Index.cpp:32</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a567ef760fd09d09ce2ee4f4e6c2d7280"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a567ef760fd09d09ce2ee4f4e6c2d7280">faiss::IndexIVF::train_residual</a></div><div class="ttdeci">virtual void train_residual(idx_t n, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00125">IndexIVF.cpp:125</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_a1ee98429c766c77235f78c6d9aa32bb4"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#a1ee98429c766c77235f78c6d9aa32bb4">faiss::HeapArray::k</a></div><div class="ttdeci">size_t k</div><div class="ttdoc">allocated size per heap </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00356">Heap.h:356</a></div></div>
<div class="ttc" id="namespacefaiss_html_af762526714e6138009c72aee98657538"><div class="ttname"><a href="namespacefaiss.html#af762526714e6138009c72aee98657538">faiss::imbalance_factor</a></div><div class="ttdeci">double imbalance_factor(int n, int k, const long *assign)</div><div class="ttdoc">a balanced assignment has a IF of 1 </div><div class="ttdef"><b>Definition:</b> <a href="utils_8cpp_source.html#l01445">utils.cpp:1445</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a46ee62aabc316ec38882a3f54e594559"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a46ee62aabc316ec38882a3f54e594559">faiss::IndexIVFFlat::remove_ids</a></div><div class="ttdeci">virtual long remove_ids(const IDSelector &amp;sel) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00476">IndexIVF.cpp:476</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html">faiss::IndexIVFFlat</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00113">IndexIVF.h:113</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_af16d325f5bef22b2e5f90ceea796e80d"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#af16d325f5bef22b2e5f90ceea796e80d">faiss::IndexIVF::ids</a></div><div class="ttdeci">std::vector&lt; std::vector&lt; long &gt; &gt; ids</div><div class="ttdoc">Inverted lists for indexes. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00056">IndexIVF.h:56</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00066">Index.h:66</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a4b40cc7a70dff41196a3b8769586667a"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a4b40cc7a70dff41196a3b8769586667a">faiss::IndexIVF::quantizer</a></div><div class="ttdeci">Index * quantizer</div><div class="ttdoc">quantizer that maps vectors to inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00050">IndexIVF.h:50</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a7a1d5eec194db0977b2318c6ed6a2b86"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a7a1d5eec194db0977b2318c6ed6a2b86">faiss::IndexIVF::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x) override</div><div class="ttdoc">Trains the quantizer and calls train_residual to train sub-quantizers. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00096">IndexIVF.cpp:96</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a9746bcd42ecec1501f221e918b25e8e7"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a9746bcd42ecec1501f221e918b25e8e7">faiss::IndexIVF::cp</a></div><div class="ttdeci">ClusteringParameters cp</div><div class="ttdoc">to override default clustering params </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00054">IndexIVF.h:54</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a5f7356766632d3ce2838f285aa6b8e76"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a5f7356766632d3ce2838f285aa6b8e76">faiss::IndexIVFFlat::add_with_ids</a></div><div class="ttdeci">virtual void add_with_ids(idx_t n, const float *x, const long *xids) override</div><div class="ttdoc">implemented for all IndexIVF* classes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00224">IndexIVF.cpp:224</a></div></div>
<div class="ttc" id="structfaiss_1_1Clustering_html"><div class="ttname"><a href="structfaiss_1_1Clustering.html">faiss::Clustering</a></div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00058">Clustering.h:58</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aed2e9757ad5f3c234fd8ad60175a2a73"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aed2e9757ad5f3c234fd8ad60175a2a73">faiss::IndexIVF::own_fields</a></div><div class="ttdeci">bool own_fields</div><div class="ttdoc">whether object owns the quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00052">IndexIVF.h:52</a></div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html"><div class="ttname"><a href="structfaiss_1_1HeapArray.html">faiss::HeapArray</a></div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00351">Heap.h:351</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a9df8b023486f54c8f2c5452787807360"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a9df8b023486f54c8f2c5452787807360">faiss::IndexIVFFlat::reset</a></div><div class="ttdeci">virtual void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00468">IndexIVF.cpp:468</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aae6f0fae1f0721af3aa0b5ea1bd9980d"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aae6f0fae1f0721af3aa0b5ea1bd9980d">faiss::IndexIVF::make_direct_map</a></div><div class="ttdeci">void make_direct_map()</div><div class="ttdoc">intialize a direct map </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00069">IndexIVF.cpp:69</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6970683faa021b7a6f1a0865c0d4eccd"><div class="ttname"><a href="structfaiss_1_1Index.html#a6970683faa021b7a6f1a0865c0d4eccd">faiss::Index::ntotal</a></div><div class="ttdeci">idx_t ntotal</div><div class="ttdoc">total nb of indexed vectors </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00067">Index.h:67</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a5590d847c5c2b958affd2a05e58a6f23"><div class="ttname"><a href="structfaiss_1_1Index.html#a5590d847c5c2b958affd2a05e58a6f23">faiss::Index::verbose</a></div><div class="ttdeci">bool verbose</div><div class="ttdoc">verbosity level </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00068">Index.h:68</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a47a3b7665e9d2be41c6d3b2e9144b73f"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a47a3b7665e9d2be41c6d3b2e9144b73f">faiss::IndexIVF::reset</a></div><div class="ttdeci">virtual void reset() override</div><div class="ttdoc">removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00087">IndexIVF.cpp:87</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_html_a954c26beebb561a6c2b0f399c48a9db3"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult.html#a954c26beebb561a6c2b0f399c48a9db3">faiss::RangeSearchPartialResult::new_result</a></div><div class="ttdeci">QueryResult &amp; new_result(idx_t qno)</div><div class="ttdoc">begin a new result </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8cpp_source.html#l00114">AuxIndexStructures.cpp:114</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchPartialResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchPartialResult.html">faiss::RangeSearchPartialResult</a></div><div class="ttdoc">the entries in the buffers are split per query </div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00151">AuxIndexStructures.h:151</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html">faiss::RangeSearchResult</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00035">AuxIndexStructures.h:35</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aacaf0b2529a9d9def094ea3728a12824"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aacaf0b2529a9d9def094ea3728a12824">faiss::IndexIVF::merge_from_residuals</a></div><div class="ttdeci">virtual void merge_from_residuals(IndexIVF &amp;other)=0</div></div>
<div class="ttc" id="structfaiss_1_1HeapArray_html_af6aa57addaa1bc754d09a2a08be4df49"><div class="ttname"><a href="structfaiss_1_1HeapArray.html#af6aa57addaa1bc754d09a2a08be4df49">faiss::HeapArray::get_ids</a></div><div class="ttdeci">TI * get_ids(size_t key)</div><div class="ttdoc">Correspponding identifiers. </div><div class="ttdef"><b>Definition:</b> <a href="Heap_8h_source.html#l00364">Heap.h:364</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8e18f641854b2bde83ecff0a2f9a6f4e"><div class="ttname"><a href="structfaiss_1_1Index.html#a8e18f641854b2bde83ecff0a2f9a6f4e">faiss::Index::metric_type</a></div><div class="ttdeci">MetricType metric_type</div><div class="ttdoc">type of metric this index uses for search </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00074">Index.h:74</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a513dfec3a250f08a9fdd18a24178e6bb"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a513dfec3a250f08a9fdd18a24178e6bb">faiss::IndexIVF::print_stats</a></div><div class="ttdeci">void print_stats() const </div><div class="ttdoc">display some stats about the inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00143">IndexIVF.cpp:143</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_ab38fde4c923abefc4185eb7450b5b95b"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#ab38fde4c923abefc4185eb7450b5b95b">faiss::IndexIVF::nlist</a></div><div class="ttdeci">size_t nlist</div><div class="ttdoc">number of possible key values </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00047">IndexIVF.h:47</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00061">Index.h:61</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a821002a9d3a1a74dc8d6f6072eca4075"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a821002a9d3a1a74dc8d6f6072eca4075">faiss::IndexIVF::add</a></div><div class="ttdeci">virtual void add(idx_t n, const float *x) override</div><div class="ttdoc">Quantizes x and calls add_with_key. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00064">IndexIVF.cpp:64</a></div></div>
<div class="ttc" id="structfaiss_1_1Clustering_html_a839f210abb11c7a1c7162e336e0ff9cf"><div class="ttname"><a href="structfaiss_1_1Clustering.html#a839f210abb11c7a1c7162e336e0ff9cf">faiss::Clustering::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x, faiss::Index &amp;index)</div><div class="ttdoc">Index is used during the assignment stage. </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8cpp_source.html#l00067">Clustering.cpp:67</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a6e92732617c4dbe364e7678dd8773a7f"><div class="ttname"><a href="structfaiss_1_1Index.html#a6e92732617c4dbe364e7678dd8773a7f">faiss::Index::is_trained</a></div><div class="ttdeci">bool is_trained</div><div class="ttdoc">set if the Index does not require training, or if training is done already </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00071">Index.h:71</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a5ac4f051396a1535426baec8f401aa93"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a5ac4f051396a1535426baec8f401aa93">faiss::IndexIVFFlat::search_knn_inner_product</a></div><div class="ttdeci">void search_knn_inner_product(size_t nx, const float *x, const long *keys, float_minheap_array_t *res) const </div><div class="ttdoc">Implementation of the search for the inner product metric. </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00273">IndexIVF.cpp:273</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8f67dfd73993e192dc78f2c93d9d9532"><div class="ttname"><a href="structfaiss_1_1Index.html#a8f67dfd73993e192dc78f2c93d9d9532">faiss::Index::train</a></div><div class="ttdeci">virtual void train(idx_t n, const float *x)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00092">Index.h:92</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_aedd0c14b5654295b291638ec7f9f9517"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#aedd0c14b5654295b291638ec7f9f9517">faiss::IndexIVF::maintain_direct_map</a></div><div class="ttdeci">bool maintain_direct_map</div><div class="ttdoc">map for direct access to the elements. Enables reconstruct(). </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00059">IndexIVF.h:59</a></div></div>
<div class="ttc" id="structfaiss_1_1ClusteringParameters_html_ad997fb511f574f7ddc69938c21612f8d"><div class="ttname"><a href="structfaiss_1_1ClusteringParameters.html#ad997fb511f574f7ddc69938c21612f8d">faiss::ClusteringParameters::spherical</a></div><div class="ttdeci">bool spherical</div><div class="ttdoc">do we want normalized centroids? </div><div class="ttdef"><b>Definition:</b> <a href="Clustering_8h_source.html#l00031">Clustering.h:31</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html_a0f22cc237c30c935df5b6560aecf8f01"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#a0f22cc237c30c935df5b6560aecf8f01">faiss::IndexIVF::merge_from</a></div><div class="ttdeci">virtual void merge_from(IndexIVF &amp;other, idx_t add_id)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00163">IndexIVF.cpp:163</a></div></div>
<div class="ttc" id="namespacefaiss_html_afd12191c638da74760ff397cf319752c"><div class="ttname"><a href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a></div><div class="ttdeci">MetricType</div><div class="ttdoc">Some algorithms support both an inner product vetsion and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00044">Index.h:44</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a52f87a2c6a9282b5b74a8615fef1b4b7"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a52f87a2c6a9282b5b74a8615fef1b4b7">faiss::IndexIVFFlat::vecs</a></div><div class="ttdeci">std::vector&lt; std::vector&lt; float &gt; &gt; vecs</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00116">IndexIVF.h:116</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_aea729c3d8c70bdd93f8e413e834851a4"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#aea729c3d8c70bdd93f8e413e834851a4">faiss::IndexIVFFlat::add_core</a></div><div class="ttdeci">void add_core(idx_t n, const float *x, const long *xids, const long *precomputed_idx)</div><div class="ttdoc">same as add_with_ids, with precomputed coarse quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00229">IndexIVF.cpp:229</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_acd2bdb06fcbe9d1f5799cf78aa6cdf0d"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#acd2bdb06fcbe9d1f5799cf78aa6cdf0d">faiss::IndexIVFFlat::search</a></div><div class="ttdeci">virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00364">IndexIVF.cpp:364</a></div></div>
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